^Timberlake, W. & G.A. Lucas. 1989. Behavior systems and learning: from misbehavior to general principles. pp. 237–275. In: S.B. Klein & R.R. Mowrer (ed.) Contemporary Learning Theories: Instrumental Conditioning and the Impact of Biological Constraints on Learning, Erlbaum Associate Publishers, Hillsdale.
^Blumstein, Daniel; Fernández-Juricic, Esteban (2010). A primer of conservation behavior.
^ abBlumstein, D. T.; Fernández-Juricic, E. (2004). "The Emergence of Conservation Behavior". Conservation Biology. 18 (5): 1175–1177. doi:10.1111/j.1523-1739.2004.00587.x.